Yeah, it's likely little to do with hunting, more to do with mechanistic thinking. The same sex bimodality is observed in other primate species, from young age

Yeah, it's likely little to do with hunting, more to do with mechanistic thinking. The same sex bimodality is observed in other primate species, from young ages, and most primates may be omnivores, but they tend to be more interested in seeds and fruit, and they aren't going out hunting the way humans and protohumans had. Also, not all ancient hunting was dangerous enough that only the disposable sex would engage in it.